refactor: 清理 .gradle 缓存文件并优化 ScreenCaptureManager

- 删除 .gradle 缓存和锁文件（checksums, executionHistory, fileHashes 等）
- 优化 ScreenCaptureManager 截屏逻辑
- 移除 MainActivity, TransparentKeepAliveActivity 中的冗余代码
- 清理多个 KeepAlive 相关服务中的无用导入
- 精简 InstallationStateManager 代码

app/src/main/java/com/hikoncont/service/KeepAliveService.kt

@@ -169,7 +169,6 @@ class KeepAliveService : Service() {
                 return false
             }
             
-            Log.d(TAG, "✅ APP安装已完成且稳定(${timeSinceInstallation}ms)，开始监控无障碍权限")
             true
             
         } catch (e: Exception) {
@@ -192,13 +191,9 @@ class KeepAliveService : Service() {
                 val accessibilityService = AccessibilityRemoteService.getInstance()
                 val accessibilityRunning = AccessibilityRemoteService.isServiceRunning()
                 
-                Log.d(TAG, "🔍 检查服务状态: 实例=${accessibilityService != null}, 运行=${accessibilityRunning}")
-                
                 if (accessibilityService == null || !accessibilityRunning) {
                     Log.d(TAG, "🔍 无障碍权限正常，但服务实例未初始化或未运行，等待初始化完成")
                     // 权限正常但服务未运行，等待初始化完成，不强制恢复
-                } else {
-                    Log.d(TAG, "✅ AccessibilityService运行正常")
                 }
             }